Unlocking field capacity: A reliable, simple, and budget- friendly indirect approach

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41210%2F24%3A100691" target="_blank" >RIV/60460709:41210/24:100691 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60460709:41210/23:96554

Výsledek na webu

<a href="https://czuni.cz/wp-content/uploads/2023/12/6th-ISSP-Book-of-Abstracts_Final_complet_web.pdf" target="_blank" >https://czuni.cz/wp-content/uploads/2023/12/6th-ISSP-Book-of-Abstracts_Final_complet_web.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Unlocking field capacity: A reliable, simple, and budget- friendly indirect approach

Popis výsledku v původním jazyce

Field capacity (FC) or field water capacity is defined as the maximum amount of water soil can hold against the force of gravity after excess water has drained away (Cassel and Nielsen, 1986). This study presents a cheap, fast and uncomplicated technique for indirectly determining the field capacity (FC) in soil, which is a crucial parameter for hydropedology, environmental modeling and irrigation applications, despite its often unclear definition. Relationships between FC (determined as water content at certain set matric potentials) and soil moisture constants, specifically maximum capillary water capacity (MCWC) and retention water capacity (RWC), were established using undisturbed soil core samples analyzed by pressure plate method and by "filter paper draining method” (Spasić et al., 2023). This method involves determining the gravimetric soil water content of core samples. The samples were saturated and then allowed to drain naturally on the filter paper for a specified time interval (max. 24 hours). This method has long history of use in the Czech Republic as an approximate of FC, but it has never been correlated with a soil water content determined at a specific matric potential. The objective was to lower the time and expenses linked to conventional FC measurement techniques, and to enable the utilization of legacy databases comprising MCWC and RWC figures. The outcomes exposed the significant possibility of the "filter paper draining method" as an encouraging strategy for indirect FC determination, tested on more than 700 samples. FC as soil water content at -33 kPa can be well approximated by the equation FC33 = 1.0802 RWC - 0.0688 (with RMSE = 0.045 cm3/cm3 and R = 0.953). For FC as soil water content at - 5 or -10 kPa, either of the following equations can be used: FC5 = 1.0146 MCWC - 0.0163 (with RMSE = 0.027 cm3/cm3 and R = 0.961) or FC10 = 1.0152 MCWC - 0.0275 (with RMSE = 0.033 cm3/cm3 and R = 0.958), respectively. Historical pedotransfer functions by Brežný and Váša (Drbal, 1971) relating FC to fine particle size fraction were also evaluated for practical application, and according to the results, they cannot be recommended for general use.

Název v anglickém jazyce

Unlocking field capacity: A reliable, simple, and budget- friendly indirect approach

Popis výsledku anglicky

Field capacity (FC) or field water capacity is defined as the maximum amount of water soil can hold against the force of gravity after excess water has drained away (Cassel and Nielsen, 1986). This study presents a cheap, fast and uncomplicated technique for indirectly determining the field capacity (FC) in soil, which is a crucial parameter for hydropedology, environmental modeling and irrigation applications, despite its often unclear definition. Relationships between FC (determined as water content at certain set matric potentials) and soil moisture constants, specifically maximum capillary water capacity (MCWC) and retention water capacity (RWC), were established using undisturbed soil core samples analyzed by pressure plate method and by "filter paper draining method” (Spasić et al., 2023). This method involves determining the gravimetric soil water content of core samples. The samples were saturated and then allowed to drain naturally on the filter paper for a specified time interval (max. 24 hours). This method has long history of use in the Czech Republic as an approximate of FC, but it has never been correlated with a soil water content determined at a specific matric potential. The objective was to lower the time and expenses linked to conventional FC measurement techniques, and to enable the utilization of legacy databases comprising MCWC and RWC figures. The outcomes exposed the significant possibility of the "filter paper draining method" as an encouraging strategy for indirect FC determination, tested on more than 700 samples. FC as soil water content at -33 kPa can be well approximated by the equation FC33 = 1.0802 RWC - 0.0688 (with RMSE = 0.045 cm3/cm3 and R = 0.953). For FC as soil water content at - 5 or -10 kPa, either of the following equations can be used: FC5 = 1.0146 MCWC - 0.0163 (with RMSE = 0.027 cm3/cm3 and R = 0.961) or FC10 = 1.0152 MCWC - 0.0275 (with RMSE = 0.033 cm3/cm3 and R = 0.958), respectively. Historical pedotransfer functions by Brežný and Váša (Drbal, 1971) relating FC to fine particle size fraction were also evaluated for practical application, and according to the results, they cannot be recommended for general use.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

40104 - Soil science

Projekt

<a href="/cs/project/QK1910299" target="_blank" >QK1910299: Udržitelné hospodaření s přírodními zdroji s důrazem na mimoprodukční a produkční schopnosti půdy</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů